Medical electrical apparatus



May 15, 1928.

C. HEINTZE MEDICAL ELECTRICAL APPARATUS Filed Jan. 28. 1926 Patented May15,1928.

UNITED STATES 1,669,468 PATENT OFFICE.

QONRAD nnm'rzn, or cn'rcaeofrnnmois, ASSIGNOR TO nanovm CHEMICAL ANDMFG. 00., a coaronarron or new JnasnY.

MEDICAL ELECTRICAL APPARATUS.

Application filed January 28, 1926. Serial 110.84334.

This invention relates to medical electrical a paratus,particularly itrelates to apparatus adapted tobe used to exposehuman bodies for thepurpose oftreatment to electric rays emanating'fromthe apparatus. It iswell known to expose a human body to the ultra-violet formly by theultra-violet rays. In addition thereto it was necessary to regulate thespeed 'with'whic'h the lamp was moved with respect to the distance ofthe lamp from the body to be treated, because the eiiicicncy of thequartz lamp depends'onthe distance of the lamp from the body exposed tothe rays of the lamp. The ratio in which the efliciency changes is asthe square of the difference in distance. It is well known thatan'overeX- posure of a body to the ultra-violet rays of aquartz lampwill result in bad injuries. If therefore the lamp is arranged very nearto the body, it will be necessary to move the lamp with a much greaterspeed than would be necessary, if the lamp would be further away.

The object of the invention is therefore to overcome the disadvantagesinherent to the apparatus used heretofore to expose a human body to theultra-violet rays of a quartz lamp and to accomplish this object theapparatus according to the invention comprises means to move the quartzlamp of the apparatus at a uniform ratio of speed. A further object ofthe invention is to regulate the distance of the lamp fromthe body to betreated in such a manner, that the rays from the lamp will affect everyportion of the bodyto acertain degree and a still further object of theinvention is to adjust the speed of the movement of the lamp and thedistance of the lamp from the body to be treated in relationto eachother in such a manner, that the best results will be obtained with thesmallest size lamp possible and with the least possibility of danger tothe patient.

Another object of the invention is to pro videan apparatus the movementof the lamp whereof may be automatically reversed at the end of the pathof movement in one direct-ion, so that the body of the patient maybeexposed to the rays on one side during the travel of the lampin onedirection and-on its'other side during the movement of the lamp in theother direction. Another object of the inventionis to provide anapparatus the driving power whereof is furnished by a reversibleelectric motor- A still further object of the invention is to providemeans for automatically cutting out the motor without cutting out thelamp, when the latter has been returned to its starting position at theend of a treatment. It is well known, that a quartz lamp does notdevelop its full but that takes some time for aqu artz'lamp to reach itsfull efficiency. It is therefore a power immediately upon beingswitchedon,

saving of time to keep the quartz lamp *burning and cut out the motor,when changing patients. It is finally an object'of the invention toprovide means for protecting the patient against the influence of therays of the lamp, when thelatter is at a st-andstill, after the motor iscut out for the purpose of changing patients. j

With these and other objects =not specifically mentioned in view theinvention consists-in certain parts and certain combinations of suchparts more fully set forth in the following specification-andspecifically mentioned in the appended claims.

In the drawings forminga part of the specification and wherein likeparts are indicated by like reference characters Fig. 1 is an elevationof an apparatus embodying theinvention, the apparatus being indicated assuspended from the ceiling of a TOOIIl.

Fig. 2 is an end view of Fig. 1. a

' Fig. 3 is a perspective view showingthe frame of an apparatusaccording to the invention attached to a bench or a table adaptedto'support a body to be treated.

A quartz lamp 1 of'wellknown construewardly upon a patient lying uponabench or table 3 (see-Fig. 3). To the'top portion of thereflectortrolley wheels 4; are attached in any convenient and suitablemanner.

'tion is surrounded by a reflector 2 adapted i to direct the light raysof the lamp downsub-frame and the trolley member. The whole frame may bemade of pipes connected together by means of standard fittings. Gnoneof'the vertical members 8 a bracket 9 is secured supporting an electricreversible motor. A friction disc 11 is mounted on the shaft 12 of themotor and frictionally engages a second friction disc 13. The seconddisc is slidably but not rotatably mounted on a shaft 14 rotatablyjournaled in a casing15 fastened to and carried by the adjacent verticalmember 8' and the trolley. member of the frame. The second disc 13. hasa hub 16 surrounding the shaft 14 and extending outwardly from thedisc.A set screw 17 ex tends through the hub and engages the shaft 14 to holdthe second disc in any adjusted position in relation to the first disc11. By

looseningthe set screw the second discmay be moved radially to the firstdisc and thereby the ratio of speed transmitted by the first disc to theshaft 14 may be regulated. A w orm18 is mounted on the portion of; shaft.14 located inside. of the casing 15 or the worm may be formedintegrally with said shaft. Another shaft 19 extending at; right anglesto the shaft carrying the worm is arranged in the casing 15 androtatably journaled therein. This shaft 19 carries a-worm gear 2Omeshing with the worm 18 and a pulley 21.

On the other end of the frame 5 the vertical member 8 and the trolleymember 6 support a second casing 22. A shaft 23 extendsthrough thiscasing and is rotatably that the reflector carrying the quartz lamp willbe moved overthe whole length of the frame 5, when the motor 10 isstartedyand that the ratio of speed of. thismovement can be regulated bythe adjustment of the second disk 13 in relation to-the first disk 11.Eyes 29 are fastened to the casings .15 and 22,and chains 30 engagingthese eyes extend upward therefrom and may be. his

tened in any desiredand suitable manner tolthe ceiling of the. roomwherein the apparatus is located, or the chains may be trained oversuitable pulleys (not shown) and counter weights (not shown) may be usedto balance the frame, and the lamp carried there by in any desireddistancefrom the patient to be treated. y

A switch device 31 has the terminal posts 32 and 33. Theseposts areinserted in the shown in dotted lines.

toward the right.

circuit (not shown) feeding the motor 10. Normally the spring contact 34contacts with both terminal posts and thereby closes the circuit. theinner end of the-spring contact a hookshaped member 35V is mountedhaving. an inclined cam surface 36. When the motor rotates in suchdirection, that the lamp travels to the right in Fig. 1 the 11pperrighthand end of the reflector will engage the cam surface 36 and willliftthe hook shaped member andvthe spring; contact from the terminalpost 32 thereby opening .the motor circuit, so that the motor is cut outand the movement of the lamp is stopped; In order to start the motoragain while the spring contact is held in lifted position bythereflector a hand operable switch posts 32 and 33 respectively,sothatthe mo- .havingthe contacts 37 is provided. The contacts 37 areconnected with. the terminal.

tor circuit will beclosed, when the contacts 7 37 are actuated by hand.Thus it will be seen, that at the end of its travel toward the right endin Fig.'1 the lamp will be automatically stopped and willnot start onits return movement until the, hand Q Operable contacts are actuatedto,close.the circuit.

In the casing 15 shown on the left hand end ofFig. 1 areverseswitehisprovided (not shown), which is actuated by. means of lever can) reversethemotor. In Fig. l the lever is shown in full lines in such a positionas to causethe motor to rotate in such a direction, that the. lamptravels toward the.

left. The carrier member 28 at the left end of the reflector has a pinor the like extending toward the left. When the lamp approaches theendof its movement toward the left, the pin 39 will engage the lever 33 andmove it into'the position. shown in Flg. 11 in dotted'lines therebyreversing the motor 10, so that the lamp movement is also reversed-andthe lamp travels now toward the right hand end of the apparatus In thecasing '22 locatedmat the right hand end of the frame a second lever 40is pivotally mounted as at 41 and a steel cable or thelike 42 connectsthe levers 38 and 40. \Vhen pin 39-moves lever 38 out of the positionshown in full .lines into the one shown in. dotted lines the cable will.pull the lever 40 out of the position shown in full lines into theposition The lever 40 has a pointed end engaging a spring .43 fastenedto a shoulder 44 in the casing 22 and tending to hold the lever 40 inthe adjusted position. The carrier member 28 ontheright hand end of thereflector is also provided with a pin or the like extending toward theright and adapted to engage the lever 40, when the lamp approach-es,theend of itsmovement By this engagement the lever 40 will be returnedinto the position shown in full lines. At the same time will also thelever 38 be returned to the position shown in full lines so that themotor is again reversed to move the lamp toward the left. Atapproximately the same time however,

that the motor is reversed the spring switch and engage the framemembers so that the carriers and the reflectors 48 supported by saidcarriers and surrounding the plain incandescent lamps may be angularlyadjusted in relation to the frame and in ratio to the distance from theobject to be exposed to the light rays.

On the right hand end of the frame, that is on the side where themovement of the lamp is interrupted, a shade 57 is fastened to the framein any suitable manner. The shade extends underneath the lamp andparallel to the frame. It protects the patient against the raysemanating from the lamp, while the same stands still.

In Fig. 3 it is diagrammatically shown how an apparatus according to thepresent invention may be fastened or mounted on a bench or table adaptedto support a patient to be treated with said apparatus. A bench or thelike 3 may be constructed in any suitable manner, for instance as shownwith a frame made of pipes, and t0 the end members 49 of said framestandards or posts 50 may be fastened in any suitable manner forinstance by means of Ts 51. The standards support adjustable brackets 52carrying pulleys 53. A cable 54 is trained over these pulleys and isfastened with one of its ends to trolley member 6 of the frame 5corresponding to the members 6 and the frame 5 described above. A cable55 is trained over one of the pulleys 53 and is fastened with one of itsends to the end of trolley member 6 opposite to the end to which cable54: is fastened. The two free ends of the cables are connected to acounterweight 56, so that the frame 5 will be always kept in ahorizontal plane while it is being moved up or down to adjust thedistance of the lamps carried by frame 5" from the patient.

Having described my invention what I claim as new and desire to secureby Letters Patent is: Y

1. In a device of the class described a quartz lamp, a frame slidablysupporting the lamp, means for moving the lamp along the: frame, meansfor reversing the move ment of the lamp, and means carried by the lampfor automatically actuating the reversing means upon arrival of the lampat the end of its path of movement in either direction.

2. In a device of the class described a quartz lamp, a frame slidablysupporting the lamp, means for moving the lamp along the frame, meansfor reversing the movementof the lamp, means carried by the lamp forautomatically actuating the reversing means upon arrival of the lamp atthe end of the path of its movement in either direction, and meansadapted to be actuated by the lamp upon arrival thereof at the end ofits path of movement in one direction for stopping the movement of thelamp.

3. In a device of the class described a quartz lamp, a frame slidablysupporting the lamp, means for moving the lamp along the frame, meansfor driving said moving means, means for reversing the movement of thedriving means, means carried by the lamp for automatically actuating thereversing means upon arrival of the lamp at the end of the path of itsmovement in either direction, and means adapted to be actuated by thelamp upon arrival thereof at the end of the path of its movement in onedirection for stopping the movement of the driving means.

4. In a device of the class described a quartz lamp, a frame slidablysupporting the lamp, means for moving the lamp along the frame, meansfor driving said moving means, means for reversing the movement of thedriving means, means carried by the lamp for automatically actuating thereversing means, upon arrival of the lamp at the end of the path of itsmovement in either direction, means adapted to be actuated by the lampupon arrival thereof at the end of the path of its movement in onedirection for stopping the movement of the driving means, and handoperable means for starting the driving means, while the stopping meansare operated by the lamp.

5. In a device of the class describeda quartz lamp, a frame slidablysupporting the lamp, means for moving the lamp along arrival of the lampat the end of the path of its movement in one direction, and means forpreventing the rays of the lamp from striking the patient while themovement of the lamp is interrupted.

In witness whereof I have affixed hereunto my signature.

CONRAD II'EINTZE;

